You can also use sumimasen in your case. Can also say sumanai which is the impolite version. As a foreigner in Japan your best bet is sumimasen.
They would be much more expensive with more parts. It’s not the market they’re trying to sell to.
It says “Skirmish”at the top so that’s probably a custom skirmish. where they have changed the settings, sorry to disappoint. :(